A compound of the formula (I), or a pharmaceutically acceptable salt thereof: ** Formula ** wherein: X represents N or CH； R1 represents ** Formula ** wherein: R18 and R22 independently represent hydrogen, halogen, hydroxy, or hydroxy-alkyl of 1 to 3 carbon atoms； R19 and R21 independently represent hydrogen, amino, hydroxy, carboxy, alkoxy of 1 to 3 carbon atoms, amino-alkyl of 1 to 3 carbon atoms, alkyl of 1 to 3 carbon atoms-C (>； = O) -NH -, alkyl of 1 to 3 carbon atoms-S (>； = O) m-NH- or hydroxy-alkyl of 1 to 3 carbon atoms-； m represents 0, 1 or 2； R20 represents hydrogen, halogen or alkoxy of 1 to 3 carbon atoms； or R1 is selected from the group consisting of: wherein: R23 represents hydrogen or methyl； R24 represents hydrogen, oxo or alkyl of 1 to 3 carbon atoms； R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16 and R17 independently represent hydrogen or methyl； or R2 and R8 together form an ethylene bridge； or R2 and R6 together form a methylene bridge； or R12 and R14 together form an ethylene bridge； and Y represents O, CHR25 or CR26R27, wherein: R25 represents hydroxy or alkoxy of 1 to 3 carbon atoms； and R26 and R27 independently represent hydrogen or halogen； with the proviso that the compound of the formula (I) is different from 2,6-di-morpholin-4-yl-8-phenyl-9H-purine.Un compuesto de la fórmula (I), o una sal farmacéuticamente aceptable del mismo:**Fórmula** en donde: X representa N o CH； R1 representa**Fórmula** en donde: R18 y R22 representan independientemente hidrógeno, halógeno, hidroxi, o hidroxi-alquilo de 1 a 3 átomos de carbono-； R19 y R21 representan independientemente hidrógeno, amino, hidroxi, carboxi, alcoxi de 1 a 3 átomos de carbono, amino-alquilo de 1 a 3 átomos de carbono, alquilo de 1 a 3 átomos de carbono-C(>；=O)-NH-, alquilo de 1 a 3 átomos de carbono-S(>；=O)m-NH- o hidroxi-alquilo de 1 a 3 átomos de carbono-； m representa 0, 1 o 2； R20 representa hidrógeno, halógeno o alcoxi de 1 a 3 átomos de carbono； o
